C_(36)二聚脂肪酸/乙二醇聚酯的合成与表征  

Synthesis and characterization of C_(36) dimer fatty acid-ethylene glycol polyester

作　　者：郭妍婷[1] 黄雪[1] 陈曼[1] 冯光炷[1] 

机构地区：[1]仲恺农业工程学院化学化工学院,广东广州510225

出　　处：《仲恺农业工程学院学报》2017年第2期28-34,共7页Journal of Zhongkai University of Agriculture and Engineering

基　　金：国家自然科学基金(31371880;31401526)资助项目

摘　　要：为开发以C_(36)二聚脂肪酸(Dimer fatty acid,DFA)作为改性剂或原料制成的新型改性不饱和聚酯材料,以DFA和乙二醇(Ethylene glycol,EG)为原料,对甲苯磺酸(p-toluene sulfonic acid,TSOH)为催化剂,通过直接熔融缩聚法制备了DFA-EG聚酯,并采用傅里叶红外光谱(Fourier transform infrared spectrum,FT-IR)、核磁共振氢谱(Nuclear magnetic resonance,1H-NMR)、差式扫描量热法(Differential scanning calorimetry,DSC)、热失重分析法(Thermogravimetric analysis,TGA)、凝胶渗透色谱(Gel permeation chromatography,GPC)表征了聚酯结构、热性能、相对分子质量及其分布.结果表明:当n(DFA)∶n(EG)∶n(TSOH)=1.0∶1.4∶0.016,反应温度165℃,反应时间6 h时,酯化率可达99.30%,产物质均相对分子质量为8 643 g/mol,相对分子质量分布为1.227 8,初始热分解温度及玻璃化转变温度分别为380℃和-13.3℃.由此认为,DFA-EG聚酯可作为一种绿色环保嵌段聚酯的基体材料.For the development of C36 Dimer fatty acid （DFA） as a modifier or raw materials to make a new type of modified unsaturated polyester materials, DFA-EG polyester was synthesized by direct melt polycondensation method, with C36 dimer fatty acid （DFA） and ethylene glycol （EG） as raw materials, p-toluene sulfonic acid （TSOH） as catalyst. The resultant polyester structure was characterized by fourier transform infrared spectrum（FT-IR） and nuclear magnetic resonance （^1H-NMR）, the thermal performance was characterized by differential scanning calorimetry （DSC） and thermogravimetric analysis （TGA）, and the relative molecular mass and its distribution of DFA-EG polyester were characterized by gel permeation chromatography （GPC）. The results showed that when n （ DFA ） ： n （EG） ： n （ TSOH ） = 1 ： 1.4： 0. 016, reaction temperature 165 ℃ and reaction time 6 h, the esterifieation rate of polyester 99. 30% could be obtained. The weight-average molecular mass was 8 643 g/mol, relative molecular mass distribution was 1. 227 8. The initial thermal decomposition temperature and glass transition temperature of 380 ℃ and - 13.3 ℃ respectively. Therefore, the DFA-EG polyester can be used as a kind of green environmental protection block polyester base material.

关 键 词：二聚脂肪酸 乙二醇 聚酯 酯化率 

分 类 号：TQ314.2[化学工程—高聚物工业]